Necroreaper

[Atypical-Abbie]

An unusual Rank 4 Xyz Monster that is based around Attributes.

 

2 or more Level 4 monsters
When this card is Xyz Summoned: You can declare 1 Attribute; if a monster with that Attribute would leave the field, banish it instead. Once per turn, during either player's turn: You can detach 1 Xyz Material from this, then target 1 face-up monster on the field and declare 1 Attribute; it becomes the declared Attribute. This card gains 100 ATK for each Xyz Material that was originally the same Attribute as this card's Attribute.

[Rakkis157]

Honestly, I feel that the first effect should have a "while this card is face-up on the field", "while this card has XYZ material" or an "until the end of this turn" clause, because as  it is, this is a very splashable card that can get really over the top when playing against decks that rely on synchro summoning, or decks that rely heavily on the graveyard, especially synchro zombies and speedroids.